Tire-tool



J. BJORNLIE.

n TIRE TOOL.

APPLfcATloN FILED `JULY 24,1920.

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To all whom t may' concern: j

Be it known that l, JULiUs BJORIILIE, a citizen of the United States, residing at Watertown, in the county of Codingt'on and State of South Dakota, have invented certain new and useful improvements in rllire- Tools; and l do hereby declare the fellowing to be a full, clear, and exact description of the invention, such as will enable others skilled in the artto which it appertains to make andiuse the same.

My present invention -has for its object to provide an extremely simple and highly eiiicient tire tool for use in applying pneumatic tire casings to wheel rims and removing the same therefrom. i

To the above end, the invention4 consists of the novel devices and combinations of devices hereinafter described and defined in the claims.

ln the accompanying drawings, which illustrate the invention, likecharacters indicate like parts thrir'ghout the several views. Referring to the drawings: Figure 1 is a perspective View .of the tire tool withthe jaws and levers 1n extreme open position; and

Fig. 2 is a corresponding view, with the' jaws nearly closed and levers locked to hold said jaws against opening movement.

The numerals 3 and 4 indicate a pair of substantially semi-circular coperatingjaws integrally formed with a pair of levers 5 and 6, respectively, pivotally connected at 7. lt is important to note that the jaw 3 is relatively long and extends for more than 180 degrees, and that the jaw 4 is relatively short and extends for considerably less thanl 180 degrees. By thus forming and connecting the jaws 3 and 4, a lateral sweeping action is given to the free ends thereof, when the levers 5 and 6 are drawn together, which gives great power. llntegrally formed with the free ends of the jaws 3 and 4 is a pair of coperating transversely elongated tire casing-engaging heads 8, the opposing surfaces of which are provided with corrugations 9 to prevent slipping. Also integrally .formed with the jaw 3, in the vicinity of its head 8, is an outwardly extended fulcrum lug 10. A finger v11, having on its free end a wheel rim-engaging hook 12, is integrally formed with one edge of the lever 6, at the free end thereof. @n the opposite Speccation of Letters Patent.

' purpose had in view.

raten-tea Mar., ae. aaai.

Application led July 24, 1920. Serial 160,398,723.

edge of the lever`6, from its :finger 11, is a wheel felly-engaging .fulcrum lug 13. @n the inner face of the finger 11 is formed a multiplicity of ratchet teeth 14 arranged for coperation with a laterally projecting lock dog 15 ,on the inner face of the lever 5 to lockV the levers 5 and 6 with their jaws flange 6 is a lip 17 arranged together with the lever 5 to receive therebetween, when both of said levers are closed, the lever 6,

to lock the same against lateral separation.

To remove the tire casing from a wheel rim by means of my improved tire tool, the jaws 3 and 4 are first opened to transversely receive the tire casing, and then by closing the levers 5 and 6, the heads 9 are clamped onto opposite sides of the casing just outward of the beads thereof. When the llevers 5 and 6 are closed, the dog 15 automatically engages the ratchet teeth 14 and locks the jaws 3 and 4 onto the casing and against opening movement so that theoperator does not have tel hold the levers pressed together when operating 4the tool to remove the casing. rll`he levers 5 and 6 are then pulled radially inward toward the axis of the wheel rim'to first carry the fulcrum lug 10 against the wheel fellyA and then lock said levers to strip the tire casing from the wheel rim.

To replace the tire casing on thewheel rim, said casing is first placed on the rim by hand as far as it will go. The tool is then inserted through the tire casing and the hook 12 interlocked with the adjacent Harige of the wheel rim with the beads of the tire casing supported on the Harige 16, which is directly supported on the lever 6 as a base of resistance. An outward swinging movementof the jaw-equipped ends of the levers 5 and 6 will carry the en aged portion of the tire casing outward o the wheel rim and then laterally onto the same.

rllhe alcove described tire tool, while eX- tremely simple and of small cost, has, in actual usage, proven hijghly ecient for the t will be noted that Q f @tamme the tire tool is composed of only three inde pendent elements and, hence, there are few parts to et out of order.

What claim is:

1. A tire tool comprising a pair of jawequipped pivotally connected levers, one of which is provided with a rim engaging hook, and eoperating lock dog and ratchet vteeth on the levers for holding the jaws 10 against opening movement.

2. A tire tool comprising a pair of jawequipped pivotally connected levers, one of which is provided with arim-engaging hook, coperating lock dog and ratchet teeth on the levers for holding the jaws against opening movement, and a laterally projecting tire-engaging flange on one of said 1evers arranged to overlap the other of said levers and engage the same as a base of re- 2 0- sistance.

3. A tire tool comprising a pair of jawequipped pivotally connected levers, one of which s provided with a rim -jengaging hook, coperating lock dog and ratchet therebetween the other of said levers and lock the twoagainst lateral separation.

In testimony whereof I aiix my signature in presence of two witnesses.

JULIUS BJORNLIE.

Witnesses:

L. T. MORRIS,

ELMER COLLINS. 

